来自地球的问候

　　Recent developments in astronomy have madeit possible to detect planets in our won MilkyWay and in other galaxies. This is a majorachievement because, in relative terms, planetsare very small and old not emit light. Findingplanets is proving hard enough, but finding lifeon them will prove infinitely more difficult.

　　1.Recent developments in astronomy have made it possible to detect planets in ourwon Milky Way and in other galaxies.

　　天文学方面最新发展使得我们能够在银河系和其他星系发现行星。

　　语言点:make it possible to do sth.的意思是“使做某事成为可能。”

　　2.This is a major achievement because, in relative terms, planets are very small andold not emit light.

　　这是一个重要的成就，因为相对来说，行星很小，而且也不发光。

　　语言点:句子结构分析:because引导原因状语从句，说明“为什么是重要的成就。”

　　3.Finding planets is proving hard enough, but finding life on them will prove infinitelymore difficult.

　　寻找行星证明相当困难，但是要在行星上发现生命会变得无比艰难。

　　语言点:is proving hard enough的意思是“证明…是困难的。”